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Lake Alamosa

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Series: GSA Special Papers
Published: 01 April 2013
DOI: 10.1130/2013.2494(01)
... From Pliocene to middle Pleistocene time, a large lake occupied most of the San Luis Valley above 2300 m elevation (7550 ft) in southern Colorado. This ancient lake accumulated sediments of the Alamosa Formation (Siebenthal, 1910), for which the lake is herein named. The existence of this lake...
Journal Article
Published: 01 December 2017
Rocky Mountain Geology (2017) 52 (2): 107-117.
... the evolution of ancient Lake Alamosa, which filled much of the San Luis Valley in the Pliocene and Pleistocene. Thick intervals of massive clay, recovered at the well (BP-3-USGS [U.S. Geological Survey]), represent deposition as part of this extensive lacustrine environment. Oriented paleomagnetic samples from...
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Series: GSA Field Guide
Published: 07 September 2016
DOI: 10.1130/2016.0044(13)
EISBN: 9780813756448
... ; Cole et al., 2007 ; Konning et al., 2011 ) (Fig. 1 ). This guidebook describes a two-day field trip across the northern and southern San Luis Basins (Figs. 2 and 3 ). The first day examines and describes evidence supporting the presence and overflow history of Pleistocene Lake Alamosa...
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Journal Article
Journal: AAPG Bulletin
Published: 01 February 1957
AAPG Bulletin (1957) 41 (2): 181-196.
... showing location of measured sections of Gallup sandstone and associated beds from the Alamosa Creek Valley area, Socorro and Catron Counties north to the Ambrosia Lake area, McKinley County, New Mexico. Generalized from Preliminary geologic map of northwestern part of New Mexico, U. S. Geological...
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Journal Article
Journal: GSA Bulletin
Published: 01 November 2014
GSA Bulletin (2014) 126 (11-12): 1481-1494.
... expansion of the local drainage and that their fill may have been largely removed by erosion. In contrast, the enclosed depression associated with trench 2 hosts a flat-bottom ephemeral lake, suggesting that it has behaved as a long-lived sediment trap. The ridges on both sides of the depression display...
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Journal Article
Published: 01 November 2002
American Mineralogist (2002) 87 (11-12): 1546-1556.
... hydrothermal system at Red Mountain, near Lake City, Colorado. The hydrothermal illites characterize an extensive zone of quartz-sericite-pyrite alteration beneath two deeply rooted bodies of magmatic-related, quartz-alunite altered rock. Nineteen illites from a 3000 ft vertical drill hole were analyzed by XRD...
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Image
Location of BP-3-USGS well near Great Sand Dunes National Park and Preserve...
Published: 01 December 2017
Figure 1. Location of BP-3-USGS well near Great Sand Dunes National Park and Preserve in Alamosa County of southern Colorado (modified from Grauch et al., 2015 ). Also shown are the: (1) inferred limit of the last highstand of Pliocene and Pleistocene Lake Alamosa before its disappearance (from
Image
(A) Location of the Rio Grande rift (shaded) and River; red box shows locat...
in > Geosphere
Published: 26 April 2019
Figure 1. (A) Location of the Rio Grande rift (shaded) and River; red box shows location of Figure 1B . (B) Generalized geology of the northern Rio Grande rift and the location of the pluvial Lake Alamosa (after Machette et al., 2013 ), Figure 1C (white box), and Figure 1D (from circled N
Image
—Sections of Gallup sandstone and associated beds of Upper Cretaceous age f...
Published: 01 February 1957
FIG. 2. —Sections of Gallup sandstone and associated beds of Upper Cretaceous age from Alamosa Creek Valley area, Socorro and Catron counties, north to Ambrosia Lake area, McKinley County, New Mexico.
Image
Geologic map showing location of measured sections of Gallup sandstone and ...
Published: 01 February 1957
FIG 1 Geologic map showing location of measured sections of Gallup sandstone and associated beds from the Alamosa Creek Valley area, Socorro and Catron Counties north to the Ambrosia Lake area, McKinley County, New Mexico. Generalized from Preliminary geologic map of northwestern part of New
Image
(A) Reconstructed topography of the original 10 Ma surface produced by remo...
in > Geosphere
Published: 01 August 2013
features are: Kaibab uplift (KU); Monument uplift (MU); proto–Lake Bonneville (LB); Alamosa Lake (A).
Journal Article
Journal: Geosphere
Published: 26 April 2019
Geosphere (2019) 15 (3): 820-838.
...Figure 1. (A) Location of the Rio Grande rift (shaded) and River; red box shows location of Figure 1B . (B) Generalized geology of the northern Rio Grande rift and the location of the pluvial Lake Alamosa (after Machette et al., 2013 ), Figure 1C (white box), and Figure 1D (from circled N...
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Book Chapter

Series: GSA Special Papers
Published: 01 April 2013
DOI: 10.1130/2013.2494(00)
... upwelling of Na-rich thermal waters in the western part of the basin adjacent to a buried horst. Machette et al. (Chapter 1) summarize evidence for a Pliocene–Pleistocene Lake Alamosa, whose blue clay deposits form an important hydrogeologic confining unit that separates an upper unconfined aquifer...
FIGURES
Journal Article
Journal: The Leading Edge
Published: 01 August 2013
The Leading Edge (2013) 32 (8): 882-891.
... , 641 – 658 , 10.1130/B26213.1 . Machette M. N. , Thompson R. A. , Marchetti D. W. , and Smith R. S. U. , 2013 , Evolution of ancient Lake Alamosa and integration of the Rio Grande during the Pliocene and Pleistocene , in Hudson M.R. and Grauch V. J. S...
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Journal Article
Journal: Geosphere
Published: 30 September 2019
Geosphere (2019) 15 (6): 1893-1926.
... from Table 2 ). Dashed black lines mark boundaries between geographic segments of the Dulce dike swarm in relation to distance from the Platoro locus (segment identifier in parentheses), as used in chemical plots ( Figs. 6 , 11 – 13 ). Intrusion locations: Am—Archuleta Mesa sill; AR—Alamosa River...
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Journal Article
Journal: AAPG Bulletin
Published: 01 November 1965
AAPG Bulletin (1965) 49 (11): 2041-2075.
FIGURES | View All (12)
Journal Article
Journal: Geosphere
Published: 24 October 2018
Geosphere (2018) 14 (6): 2487-2504.
.... For example, much work has focused on the application of Equation 2 or similar to the evolution of a step function in an effort to understand the timing of fault offsets and the abandonment of lake shorelines (e.g., Andrews and Hanks, 1985 ; Andrews and Bucknam, 1987 ). Given an appropriate initial...
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Journal Article
Journal: Geosphere
Published: 01 June 2017
Geosphere (2017) 13 (3): 974-990.
... are known to exist under significant portions of the San Luis Basin in a package that thins away from the San Juan Mountains ( Brister, 1990 ; Brister and Gries, 1994 ). None crop out in the range front near the study area. Locally, the dominant shallow constituent of the Santa Fe Group is the Alamosa...
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Journal Article
Journal: AAPG Bulletin
Published: 01 April 1946
AAPG Bulletin (1946) 30 (4): 561-580.
... and where he chooses and every barrel of oil belongs to the estate. The presence of oil along the course of the Navajo River was first mentioned by Arthur Lakes when, in 1901, his report on the probabilities of oil in the region between Pagosa Springs, Colorado, and the San Juan River appeared...
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Journal Article
Published: 01 August 2005
The Canadian Mineralogist (2005) 43 (4): 1157-1170.
... mine, Colorado, USA, sulfide waste-rocks generated acidic solutions with high concentrations of Al, Cu, Fe, Mn, and Zn, which caused pollution of the Alamosa River ( Ortiz et al. 1995 , Walton-Day et al. 1995 ). In acid-generating mine wastes, aluminum is released from aluminosilicates. The nature...
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